WhatsApp is truly end-to-end encrypted using the signal protocol. The same protocol Signal uses (believe it or not). Meta truly cannot read your messages. But they CAN see who you are messaging, how often you message them, when you are messaging them, where you are when you message them, and plenty more. They can collect metadata. Metadata is the data they actually care about. Honestly, it doesn’t matter as much if you’re asking your friend if they want to hang or sending nudes. The metadata is what they want, and it’s exactly what they’re collecting.